How is it typically done in the Cisco IOS - for a certain public ip for port 587 to be redirected to the same certain ip but port 25? Thanks,
Sunday, January 23, 2005, 12:38:04 PM, Matt <[EMAIL PROTECTED]> wrote: M> Unless you have a reason why you would want to use another piece of M> software for validating addresses (very necessary these days), you are M> probably going to want something that is software and does port M> forwarding, but not another MTA of some sort. I don't know of any port M> forwarding software that isn't some form of a firewall or proxy. Maybe M> someone else knows better about what is available. M> I believe that you could get away with a really cheap standard Linksys M> router if you weren't looking to spend a lot of cash, the config would M> be somewhat of a kludge to have work properly, but I'm pretty sure it M> can be done.. Lots of routers do port forwarding, so you don't M> necessarily need a Cisco to pull this off if you wanted a more M> straightforward solution. IMO, every Internet server should be behind a M> port blocking router, otherwise you may very well end up hacked through M> some open port exploit, so a router has many advantages besides this one M> thing. M> Matt M> Gary Brumm wrote: >> SBC just blocked port 25 for their dynamically assigned DSL users. I >> can have those users switch to SBC's SMTP servers but I have >> been meaning to open up port 587 for my users that travel. I was >> wondering what software solutions you guys have been using (like the >> ones suggested below) and if there are any problems associated with >> doing it via software on the IMail machine as opposed to doing it with >> a hardware firewall. If it is a software solution it must run as a >> service. >> >> Thanks, >> >> Gary >> >> >> At 09:38 AM 8/27/2004, you wrote: >> >>> [EMAIL PROTECTED] wrote: >>> >>>> Jim, >>>> If your firewall supports it, I'd suggest port remapping on the >>>> firewall. >>>> Have any port translated to IMail on port 25. >>>> You could achieve the same solution using a port redirector software >>>> on your IMail box. >>>> There is a bunch of Port Forwarder/Redirector Softwares available, e.g. >>>> PortTunnel by http://www.steelbytes.com/ >>>> or >>>> Fpipe by >>>> http://www.foundstone.com/index.htm?subnav=resources/navigation.htm&subcontent=/resources/freetools.htm >>>> >>> >>> >>> I gave FPipe a shot, and while it does work, IMail sees the >>> redirected traffic as coming from itself, which will defeat my >>> relaying setting. While that may not be a problem at the moment, some >>> time in that not-so-distant future, some spammer may become clever >>> enough to start relaying traffic through port 587, and I will become >>> an open relay. >>> >>> Is there a redirector that does preserve the source IP, or is that >>> even possible? >>> >>> -- >>> A. Clausen >>> [EMAIL PROTECTED] >>> >>> >>> To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html >>> List Archive: >>> http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ >>> Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ >> >> >> ComsecNet >> Dedicated Data Services >> Stockton, CA >> Phone:(209) 463-2809 >> Fax: (209) 938-0481 >> Email: [EMAIL PROTECTED] >> Web: www.comsec.net >> >> This message is intended for the use of the individual or entity to >> which it is addressed and may contain information that is privileged, >> confidential, and exempt from disclosure under applicable law. If the >> reader of this message is not the intended recipient or an employee or >> agent responsible for delivering to the intended recipient, you are >> hereby notified that any dissemination, distribution or copying of >> this communication is strictly prohibited. If you have received this >> communication in error please destroy this message and notify the >> sender by reply email. >> >> >> >> >> >> To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html >> List Archive: >> http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ >> Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ >> >> M> To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html M> List Archive: M> http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ M> Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ ---- Don Brown - Dallas, Texas USA Internet Concepts, Inc. [EMAIL PROTECTED] http://www.inetconcepts.net (972) 788-2364 Fax: (972) 788-5049 ---- To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
